mirror of
https://github.com/IcedRooibos/py32f0-template.git
synced 2025-10-30 17:32:05 -07:00
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
/**
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* Demo of internal temperature sensor
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*
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* - If the internal sensor reading is always 4095(0xFFF), disconnect the UART RX(A3) pin
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*
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*/
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#include "main.h"
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#include "py32f0xx_bsp_clock.h"
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#include "py32f0xx_bsp_printf.h"
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#define VDDA_APPLI ((uint32_t)3300)
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uint16_t convert_result = 0, temperature = 0;
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static void APP_ADCConfig(void);
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int main(void)
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{
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// Set system clock to 48MHz
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BSP_RCC_HSI_PLL48MConfig();
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// Initialize UART on PA2:TX PA3:RX
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BSP_USART_Config(115200);
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printf("PY32F0 Internal Temperature Sensor Demo\r\nClock: %ld\r\n", SystemCoreClock);
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APP_ADCConfig();
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// Start ADC regular conversion
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LL_ADC_REG_StartConversion(ADC1);
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while (1)
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{
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if(LL_ADC_IsActiveFlag_EOS(ADC1))
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{
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LL_ADC_ClearFlag_EOS(ADC1);
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// Read regular conversion data, 12-bit
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convert_result = LL_ADC_REG_ReadConversionData12(ADC1);
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// Convert it to temperature
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temperature = __LL_ADC_CALC_TEMPERATURE(VDDA_APPLI, convert_result, LL_ADC_RESOLUTION_12B);
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printf("Temperature:%d DR:%d \r\n", temperature, convert_result);
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LL_mDelay(1000);
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}
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}
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}
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static void APP_ADCConfig(void)
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{
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__IO uint32_t wait_loop_index = 0;
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LL_ADC_InitTypeDef ADC_Init;
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LL_ADC_REG_InitTypeDef LL_ADC_REG_InitType;
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LL_ADC_Reset(ADC1);
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LL_APB1_GRP2_EnableClock(LL_APB1_GRP2_PERIPH_ADC1);
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// Calibrate start
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if (LL_ADC_IsEnabled(ADC1) == 0)
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{
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LL_ADC_StartCalibration(ADC1);
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while (LL_ADC_IsCalibrationOnGoing(ADC1) != 0);
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/* Delay 1ms(>= 4 ADC clocks) before re-enable ADC */
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LL_mDelay(1);
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}
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// Calibrate end
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ADC_Init.Clock = LL_ADC_CLOCK_SYNC_PCLK_DIV64;
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ADC_Init.DataAlignment = LL_ADC_DATA_ALIGN_RIGHT;
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ADC_Init.LowPowerMode = LL_ADC_LP_MODE_NONE;
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ADC_Init.Resolution = LL_ADC_RESOLUTION_12B;
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LL_ADC_Init(ADC1, &ADC_Init);
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LL_ADC_SetSamplingTimeCommonChannels(ADC1, LL_ADC_SAMPLINGTIME_239CYCLES_5);
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// Regular ADC config
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LL_ADC_REG_InitType.ContinuousMode = LL_ADC_REG_CONV_CONTINUOUS;
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LL_ADC_REG_InitType.DMATransfer = LL_ADC_REG_DMA_TRANSFER_NONE;
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LL_ADC_REG_InitType.Overrun = LL_ADC_REG_OVR_DATA_OVERWRITTEN;
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LL_ADC_REG_InitType.SequencerDiscont = LL_ADC_REG_SEQ_DISCONT_DISABLE;
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LL_ADC_REG_InitType.TriggerSource = LL_ADC_REG_TRIG_SOFTWARE;
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LL_ADC_REG_Init(ADC1, &LL_ADC_REG_InitType);
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// Set common path and internal channel
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LL_ADC_SetCommonPathInternalCh(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_PATH_INTERNAL_TEMPSENSOR);
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// Delay to ensure temperature sensor becomes stable
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wait_loop_index = ((LL_ADC_DELAY_TEMPSENSOR_STAB_US * (SystemCoreClock / (100000 * 2))) / 10);
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while(wait_loop_index != 0)
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{
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wait_loop_index--;
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}
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// Select temperature sensor
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LL_ADC_REG_SetSequencerChannels(ADC1, LL_ADC_CHANNEL_TEMPSENSOR);
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// Enable ADC
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LL_ADC_Enable(ADC1);
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LL_mDelay(1);
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}
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void APP_ErrorHandler(void)
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{
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while (1);
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}
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#ifdef USE_FULL_ASSERT
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void assert_failed(uint8_t *file, uint32_t line)
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{
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while (1);
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}
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#endif /* USE_FULL_ASSERT */
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